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    Subject[PATCH 1/5] sched: event: add trace events when a task starts executing on a cpu
    Date
    sched_switch_finish is sent when a task starts executing on a cpu.
    It sends in context of this task, that's why sched_switch can't be used.
    sched_switch is send when a task goes out from a cpu.

    This two events will be needed for profiling sleep time.

    Signed-off-by: Andrew Vagin <avagin@openvz.org>
    ---
    include/trace/events/sched.h | 19 +++++++++++++++++++
    1 files changed, 19 insertions(+), 0 deletions(-)

    diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
    index ea7a203..b2219d8 100644
    --- a/include/trace/events/sched.h
    +++ b/include/trace/events/sched.h
    @@ -149,6 +149,25 @@ TRACE_EVENT(sched_switch,
    __entry->next_comm, __entry->next_pid, __entry->next_prio)
    );

    +TRACE_EVENT(sched_switch_finish,
    +
    + TP_PROTO(struct task_struct *p),
    +
    + TP_ARGS(p),
    +
    + TP_STRUCT__entry(
    + __array( char, comm, TASK_COMM_LEN )
    + __field( pid_t, pid )
    + ),
    +
    + TP_fast_assign(
    + __entry->pid = p->pid;
    + memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
    + ),
    +
    + TP_printk("comm=%s pid=%d", __entry->comm, __entry->pid)
    +);
    +
    /*
    * Tracepoint for a task being migrated:
    */
    --
    1.7.1


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